Do Over: 1850s Brooch Conversion

This is not my do-over. People have been upcycling old jewellery since way before our time. Here is a brooch dating from the 1840s or 1850s that was transformed into a pendant. How do I know, you ask. Look at the back of the piece. The tube hinge is still present and it looks like the original pin was turned into a loop. The c-clasp has been removed (or maybe it just fell off — I’ve accidentally snapped of more than one old c-clasp), and a more contemporary bale was added.